Jump to content

Cablenut prob? Newbie


Recommended Posts

help I have a funny problem.

I have a cable connection whihc is connected to the local gateway via a wireless unit on the top of my apartment building.

It is rated at 256 kbps and I used to get abot 240 kbps. I always used testmy.net for the speed check then I stumbled upon and installed Cablenut. The RWIN calculator on the link given by VanBuren wasnt working  so I put in my own value and I was getting about 281 kbps :) Then my connection had some connectivity problem (local I am sure) so I had removed the tweaks and reinput them yesterday using the default settings of Cable_DSL 1500_256.

Now the funny thing, on tesing I am getting:

:::.. Download Stats ..:::

Connection is:: 272 Kbps about 0.3 Mbps (tested with 579 kB)

Download Speed is:: 33 kB/s

Tested From:: http://www.testmy.net/

Test Time:: Wed Mar 23 01:56:59 UTC+0530 2005

Bottom Line:: 5X faster than 56K 1MB download in 31.03 sec

Diagnosis: Awesome! 20% + : 172 % faster than the average for host

I use GetRight for downloading stuff now but that doesnt show accurate download speeds  but it keeps fluctuating showing 0 KB/s then 22.3 KB/s etc earlier it used to show constant values and give stable downloads. Is it because of the registry tweak?

Should I remove the cablenut settings? anything I can change? Also how can I calculate accurate RWIN?

Link to post
Share on other sites

hey Capt.Beefheart and welcome to the forum :)

i would keep the cablenut settings as you had them and got 281 Kbps

i do not know your cap, but when calculating a RWIN with wireless you probl need to use a high latency

quote from http://forums.speedguide.net/showthread.php?t=73799

"TcpWindowSize (RWIN) FORMULA

(Maximum Bandwidth x Maximum Anticipated Latency) / 8

Example of a connection with a 3000 download cap with a maximum latency of 100 ms:

(3000 x 100) / 8 = 37500 To make it a multiple of MSS divide by 1460:

37500 / 1460 = 25.68 Then round up to the nearest even whole number:

26 x 1460 = 37960 - Optimum RWIN"

Anticipated Latency is the worst average ping you has to your gateway during downloading several files at the very same time

I suggest a value of 250 ms or more for you

VanBuren :)

Link to post
Share on other sites

Thanks VanBuren for the prompt reply.

Funnily enough the settings I had used to get 281 were a mistake. since the RWIN link wasnt working I checked out the formula written in the page code which was i believe : [(Bandwidth(bytes)*Latency(ms))/MSS^0.5]*MSS I being the d00fus that I am while pinging took the TTL to be my latency which in this case was 30 and so I put in that value.

So if I get your formula right my RWIN should be :

(Bandwidth*Latency)/8/MSS then round off then  *MSS

so in this case

(256*250)/8=8000/1460=5.479 then 6*1460=8760 should be my RWIN? Is that right?

Also why the pulsing of the bandwidth the bandwidth meter in my GetRight window looks like an EKG full of spikes not a continuous stream of high speed goodness  :D

Cheers

Link to post
Share on other sites

:D Hi Pitbull!

Here are my latest stats after putting in Van Buren's ccs file

:::.. Upload Stats ..:::

Connection is:: 114 Kbps about 0.1 Mbps (tested with 97 kB)

Upload Speed is:: 14 kB/s

Tested From:: http://www.testmy.net/

Test Time:: Wed Mar 23 09:43:02 UTC+0530 2005

Bottom Line:: 2X faster than 56K 1MB upload in 73.14 sec

Diagnosis: Awesome! 20% + : 39.02 % faster than the average for host

:::.. Download Stats ..:::

Connection is:: 258 Kbps about 0.3 Mbps (tested with 579 kB)

Download Speed is:: 31 kB/s

Tested From:: http://www.testmy.net/

Test Time:: Wed Mar 23 09:46:15 UTC+0530 2005

Bottom Line:: 5X faster than 56K 1MB download in 33.03 sec

Diagnosis: Awesome! 20% + : 141.12 % faster than the average for host

I do get slightly different numbers if i test consecutively, i think its because of that pulsing phenomenon I mentioned earlier. Is the packet loss gonna be a problem? I think on average my connection is running faster but before putting in the tweaks, I was getting around 220-240 Kbps constant.

Any way to get around the spiking?

Cheers

Link to post
Share on other sites
  • 4 weeks later...
:::.. Upload Stats ..:::

[table]Connection is:: 114 Kbps about 0.1 Mbps (tested with 97 kB)

Upload Speed is:: 14 kB/s

Tested From:: http://www.testmy.net/

Test Time:: Wed Mar 23 09:43:02 UTC+0530 2005

Bottom Line:: 2X faster than 56K 1MB upload in 73.14 sec

Diagnosis: Awesome! 20% + : 39.02 % faster than the average for host

:::.. Download Stats ..:::

Connection is:: 258 Kbps about 0.3 Mbps (tested with 579 kB)

Download Speed is:: 31 kB/s

Tested From:: http://www.testmy.net/

Test Time:: Wed Mar 23 09:46:15 UTC+0530 2005

Bottom Line:: 5X faster than 56K 1MB download in 33.03 sec

Diagnosis: Awesome! 20% + : 141.12 % faster than the average for host

u said u had a cable connection, why are your speeds so low?

Link to post
Share on other sites
×
×
  • Create New...